Finding the Fourth Proportional to 1,168.18, 1,752.56 and 437.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,168.18 : 1,752.56 = 437.78 : x
2. Step 2: Convert to fraction form
   1,168.18/1,752.56 = 437.78/x
3. Step 3: Cross multiply
   1,168.18x = 1,752.56 × 437.78
4. Step 4: Simplify right side
   1,168.18x = 767,235.72
5. Step 5: Solve for x
   x = 767,235.72/1,168.18
6. Step 6: Final answer
   x = 656.78